Cooperative iodine and photoredox catalysis for direct oxidative lactonization of carboxylic acids
作者:Thomas Duhamel、Kilian Muñiz
DOI:10.1039/c8cc08594c
日期:——
A new method for the formation of γ- and δ-lactones from carboxylic acids through direct conversion of benzylic C–H to C–O bonds is described. The reaction is conveniently induced by visible light and relies on a mild cooperative catalysis by the combination of molecular iodine and an organic dye.
[EN] NEW CCR2 RECEPTOR ANTAGONISTS AND USES THEREOF<br/>[FR] NOUVEAUX ANTAGONISTES DU RÉCEPTEUR CCR2 ET LEURS UTILISATIONS
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011073154A1
公开(公告)日:2011-06-23
The present invention relates to novel antagonists for CCR2 (CC chemokine receptor 2) of Formula (I) and their use for providing medicaments for treating conditions and diseases, especially pulmonary diseases like asthma and COPD.
The present invention relates to novel antagonists for CCR2 (CC chemokine receptor 2) and their use for providing medicaments for treating conditions and diseases, especially pulmonary diseases like asthma and COPD.
Analytic and preparative resolution of recemic ?- and ?-lactones by chromatography on cellulose triacetate. Relationship between elution order and absolute configuration
作者:Eric Francotte、Dieter Lohmann
DOI:10.1002/hlca.19870700615
日期:1987.9.23
biologically active substances) have been separated chromatographically on the chiral phase cellulosetriacetate, crystallographic form I (CTAI). For different series of five-membered-ring lactones, relationships have been found between the elutionorder of the enantiomers and their absoluteconfiguration. Preparativeresolutions of γ-Phenyl-γ-butyrolactone (1) and of the Pheromone component 5b have been carried
An indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical chemistry. In this context, we found an indium-catalyzed direct conversion of lactones into thiolactones in the presence of elemental sulfur and a